Electronic circuit casing



FIG. 1 shows a top perspective view of an electronic circuit casing in accordance with the present invention;

FIG. 2 shows a bottom view of the electronic circuit casing in accordance with the present invention; and,

FIG. 3 shows a top view of the electronic circuit casing in accordance with the present invention. 

I claim the ornamental design for an electronic circuit casing, as shown and described. 